skills/sales-gumroad/SKILL.md
Gumroad platform help — digital product sales, subscriptions, memberships, license keys, email broadcasts, affiliate management, Discover marketplace, Ping webhooks, and REST API. Use when setting up a Gumroad store, products not selling on Gumroad, Gumroad fees eating into profits, Gumroad vs Payhip or Lemon Squeezy, license key verification not working, Gumroad webhook or API integration, email broadcasts not reaching buyers, or affiliate program setup on Gumroad. Do NOT use for general digital product strategy (use /sales-digital-products) or checkout optimization across platforms (use /sales-checkout).
npx skillsauth add sales-skills/sales sales-gumroadInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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If references/learnings.md exists, read it first for accumulated platform knowledge.
What do you need help with?
What's your situation?
Product type?
Revenue level?
Skip-ahead rule: if the user's prompt already contains enough context, skip to Step 2.
| Problem domain | Route to |
|---|---|
| Digital product pricing, launch strategy, platform comparison | Run: /sales-digital-products {your question} |
| Checkout page optimization, order bumps, cart abandonment | Run: /sales-checkout {your question} |
| Membership structure, course design, retention | Run: /sales-membership {your question} |
| Email sequences after purchase, nurture campaigns | Run: /sales-email-marketing {your question} |
| Affiliate commission structure, recruitment strategy | Run: /sales-affiliate-program {your question} |
| Webhook/API integration with other tools | Run: /sales-integration {your question} |
If the question is Gumroad-specific (setup, features, pricing, API, troubleshooting), continue to Step 3.
Read references/platform-guide.md for the full platform reference — modules, pricing, integrations, data model, workflows, API quick reference.
Answer the user's question using only the relevant section. Don't dump the full reference.
You no longer need the platform guide — focus on the user's specific situation.
references/gumroad-api-reference.md for endpoint details. The Ping webhook sends POST data as x-www-form-urlencoded, not JSON.product_id not product_permalink for verification.If you discover a gotcha, workaround, or tip not covered in references/learnings.md, append it there.
Best-effort from research — review these, especially items about plan-gated features and integration gotchas that may be outdated.
x-www-form-urlencoded, not JSON. Many webhook handlers expect JSON and silently fail.product_id instead of product_permalink for license verification./sales-digital-products — Digital product sales strategy (pricing, platform selection, launch playbooks)/sales-checkout — Checkout optimization (upsells, order bumps, payment plans, cart abandonment)/sales-membership — Membership sites and online courses (content delivery, retention, pricing)/sales-email-marketing — Email marketing (launch sequences, nurture campaigns, broadcasts)/sales-affiliate-program — Affiliate program design (commissions, recruitment, tracking)/sales-integration — Connecting tools via webhooks, Zapier, API pipelines/sales-payhip — Payhip platform help (lower fees, PayPal support, similar features)/sales-lemonsqueezy — Lemon Squeezy platform help (5% fee, MoR, license keys)/sales-do — Not sure which skill to use? The router matches any sales objective to the right skill. Install: npx skills add sales-skills/sales --skill sales-doSkill does: Asks about pricing, traffic source, and product page. Discovers they're relying on Gumroad Discover for traffic (which requires a prior sale to activate). Recommends driving traffic from email list and social media. Suggests a lead magnet (free chapter) to build an email list via Gumroad's email collection. Reviews pricing — if under $10, flags the high effective fee rate and suggests bundling to increase AOV.
Skill does: Loads the API reference. Walks through POST /licenses/verify with product_id and license_key parameters. Notes the Jan 2023 change from product_permalink to product_id. Shows how to check uses count against a limit and handle test purchases. Points to webhook signature verification via x-gumroad-signature.
Skill does: Asks about current monthly revenue and product types. Calculates fee comparison: at $3K/month, Gumroad costs ~$360/month (10% + $0.50 × ~60 sales) vs Lemon Squeezy at ~$165 (5% + $0.50). Notes LS handles tax as MoR (Gumroad now does too since Jan 2025). Flags PayPal availability (LS has it, Gumroad doesn't). Routes to /sales-digital-products for deeper platform comparison.
Symptom: Customers report "there was a temporary problem" at checkout Cause: Momentary gateway failure, 3D Secure friction, or card declined Solution: Wait 10–15 minutes and retry. Check email and bank — the charge may have gone through. If persistent, try a different card. Gumroad has no PayPal fallback since Oct 2024.
Symptom: POST /licenses/verify returns 404 or error
Cause: Using product_permalink instead of product_id for products created after Jan 9, 2023
Solution: Switch to product_id parameter. Check increment_uses_count is set correctly. Test with a known-good key first.
Symptom: No POST requests hitting your endpoint after a sale
Cause: Ping endpoint URL not configured, endpoint returning non-2xx, or HTTPS certificate issue
Solution: Go to Settings → Advanced → Ping. Paste your endpoint URL. Click "Send test ping" to verify. Ensure your endpoint returns 200 and accepts application/x-www-form-urlencoded data. Gumroad retries up to 3 times over 15–20 minutes.
tools
UpViral platform help — viral referral marketing and list-building platform (by Emarky) for viral sweepstakes, giveaway/reward campaigns, pre-launch waiting lists, and milestone referral programs, with REST API (app.upviral.com/api/v1/), callback-URL webhooks, PHP SDK, fraud detection (IP-based suspicious-referral flagging), A/B testing, smart leaderboards, unlockable incentives, and 30+ native ESP/CRM integrations (Mailchimp, ActiveCampaign, ConvertKit, AWeber, HubSpot, Klaviyo, Intercom) plus Zapier/Make/Pipedream/Integrately/Pabbly. Use when UpViral campaigns aren't tracking referral points correctly, deciding between Starter $79/mo annual (10K leads, 1 brand, NO API) vs Business $119/mo (25K, 2 brands, API + webhooks unlocked) vs Premium $319/mo (100K, 5 brands, dedicated account manager), the API returns errors because you're on the Starter tier where API/webhooks are gated, building an UpViral→CRM or UpViral→data-warehouse pipeline with add_contact / get_leads / get_leads_points / add_points / get_custom_fields / lists methods (uvapikey + uvmethod form-encoded POST), interpreting fraud flags where same-IP referrals get marked suspicious and you must manually activate/delete/blacklist, setting up the Callback URL (webhook) to fire on reward-unlock events, Zapier New Lead / New Reward Unlocked triggers not firing, ClickFunnels/Shopify/funnel-builder integration breaking, the drag-and-drop page builder showing broken widgets or limited customization, the setup feeling long and complicated for your first campaign, or picking UpViral over Viral Loops / KickoffLabs / Vyper / Prefinery / Gleam / KingSumo / ShortStack for a viral campaign. Do NOT use for general newsletter audience growth strategy across all platforms (use /sales-audience-growth), newsletter monetization (use /sales-newsletter), KickoffLabs-specific help (use /sales-kickofflabs), no-code merge-tag newsletter referrals (use /sales-referralkit), SparkLoop paid recommendations (use /sales-sparkloop), or full-stack multi-level Level-1/2/3 referral/affiliate tracking (use /sales-referralhero).
development
ReferralHero platform help — full-stack referral, affiliate, waitlist, contest, and NPS platform with subscriber API, webhooks, Zapier, Mailchimp/Kit/AWeber/Klaviyo/ActiveCampaign/SendLane connectors, coupon codes, multi-level referral tracking (Level 1/2/3), anti-fraud, and 5,000 calls/hour rate limit. Use when ReferralHero campaigns aren't tracking referrals correctly, deciding between PRO $199/mo (10K members, includes API + webhooks) and PREMIUM $399/mo (50K members, adds ReCaptcha + SMS verification), authentication is failing with no_token or X-API-Key header is being ignored, multi-level referral counts (Level 2/3) aren't appearing for downline subscribers, coupon group endpoints return 404 or coupon arrays max out, hitting the 5,000 calls/hour soft limit and getting too_many_calls 429s, the Mailchimp/Kit native integration is double-adding subscribers, webhook payloads aren't firing on confirmation events, importing Stripe customer IDs through transaction tracking, generating reward fulfillment when subscribers cross milestone thresholds (promote/unlock_promoted_reward), comparing ReferralHero against SparkLoop/ReferralKit/Viral Loops/GrowSurf/KickoffLabs for referral marketing, or routing referral data via add_bulk_transactions (500-transaction batch limit). Do NOT use for general newsletter audience growth strategy (use /sales-audience-growth), general newsletter monetization (use /sales-newsletter), no-code newsletter-only referral with merge-tag insertion (use /sales-referralkit), SparkLoop's paid recommendations or partner network (use /sales-sparkloop), or affiliate program strategy across many platforms (use /sales-affiliate-program).
tools
KickoffLabs platform help — viral marketing platform for pre-launch waitlists, bonus-entry giveaways, milestone-reward referral programs, leaderboard giveaways, and email opt-in bribes with REST API v1 + v2, server-side webhooks (in/out), KOL.js JavaScript library, AnyForm script for custom pages, fraud detection (duplicate_ip / bounced / duplidate_email flags), SMS verification add-on, native ESP integrations (Klaviyo, Mailchimp, ActiveCampaign, Brevo), website builders (Webflow, Wix, Squarespace, Weebly), Shopify, Facebook Audiences, Slack, Zapier. Use when KickoffLabs viral campaigns aren't tracking referrals correctly, deciding between Hobby $13/mo annual (500 leads/mo no A/B no reward emails) vs Premium $48/mo (2.5K + A/B + reward emails + tracking pixels) vs Business $99/mo (10K + custom email templates + custom domains + advanced reporting + 3 team) vs Enterprise $202/mo (25K + 5 team + SMS included), API key getting rejected because you embedded it in client-side JavaScript instead of server-side, can't decide whether to use v1 /subscribe vs v2 /tags/:TAG_ID/lead for lead creation, webhook payloads firing with `__fraudulent` flag and you need to interpret the duplicate_ip/bounced/duplidate_email reason codes (yes, duplidate is spelled that way in their docs), AnyForm script not posting to KickoffLabs vs native API endpoint, leaderboard endpoint returning more than 50 leads is not allowed, social_id (kid in share URLs) attribution chain breaking between v1 and v2, contest score vs lead count metrics in the webhook payload are confusing, SMS Verification only available on Premium+ as $50/mo add-on (Enterprise includes), per-month lead cap auto-upgrades at $8 per 1000 overage leads, picking between KickoffLabs and Viral Loops / UpViral / Prefinery / ReferralCandy / Voucherify for viral campaign type fit, or rate limit per tier (10-100 calls/minute) is hitting on bulk imports. Do NOT use for general newsletter audience growth strategy (use /sales-audience-growth), general newsletter monetization (use /sales-newsletter), no-code merge-tag-only newsletter referrals (use /sales-referralkit), SparkLoop paid recommendations + partner network (use /sales-sparkloop), or full-stack referral/affiliate with multi-level Level-1/2/3 tracking (use /sales-referralhero).
development
Routes any sales, marketing, ad, or GTM objective to the right specialized skill and outputs the install command for that skill plus a ready-to-paste prompt packed with the user's context. Asks clarifying questions when the objective is ambiguous, then hands back a copy-paste-runnable next step. Covers prospecting, outbound cadences, deals, proposals, forecasting, deliverability, enrichment, intent, content, coaching, CRO, SEO, launch directories, newsletters, email/SMS/push marketing, chatbots, influencer marketing, social media, employee advocacy, media relations, reviews, data hygiene, B2B advertising, retargeting, affiliate, loyalty, digital products, memberships, webinars, checkout, and platform-specific help. Use when the user has a sales or marketing question and isn't sure which skill to use, or wants a multi-skill sequence with a batch install command. Do NOT use to solve problems directly — this skill only routes.